Database Relationships and Entity Attributes
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Questions and Answers

What is the role of a primary key field in a table?

  • It remains a primary key in the original table (correct)
  • It becomes a foreign key in another table
  • It is used to model business objects
  • It is used to describe relationships between entities

    • What type of words often describe relationships between entities?

  • Adverbs
  • Verbs (correct)
  • Nouns
  • Adjectives

    • What is the purpose of a conceptual data model?

  • To design the database schema
  • To present the physical database structure
  • To model the business objects in a system (correct)
  • To implement the database

    • What is an attribute in the context of a data model?

    <p>A characteristic of an entity</p> Signup and view all the answers

    What is the relationship between a primary key and a foreign key?

    <p>A foreign key is a primary key in another table</p> Signup and view all the answers

    What is the role of a data modeler?

    <p>To model the business objects in a system</p> Signup and view all the answers

    What is the primary purpose of a Logical Data Model?

    <p>To establish the relationships between data elements</p> Signup and view all the answers

    What type of entity is typically introduced in a Logical ERD?

    <p>Associative entity</p> Signup and view all the answers

    What aspect of a database is considered when developing a Physical Data Model?

    <p>The convention and restriction of the DBMS</p> Signup and view all the answers

    What is the main difference between a Logical ERD and a Physical ERD?

    <p>The column types and lengths</p> Signup and view all the answers

    What is the purpose of a Conceptual ERD?

    <p>To provide a high-level overview of the database</p> Signup and view all the answers

    Which model is responsible for managing many-to-many relationships?

    <p>Logical ERD</p> Signup and view all the answers

    What is the primary purpose of an Entity Relationship Diagram (ERD)?

    <p>To describe an overall design concisely yet accurately</p> Signup and view all the answers

    What is an instance of an entity in a database?

    <p>A record or row in a table</p> Signup and view all the answers

    What is the characteristic of a primary key in a database?

    <p>It identifies uniquely every row</p> Signup and view all the answers

    What is the purpose of a foreign key in a database?

    <p>To link two tables together</p> Signup and view all the answers

    What are the three components of an Entity Relationship Diagram (ERD)?

    <p>Entities, Attributes, and Relationships</p> Signup and view all the answers

    What is an attribute in a database?

    <p>A fact or description of an entity</p> Signup and view all the answers

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